Question about CVS Trigger Scripts

I've been using the documentation and configuration file comments to come up
with pre-commit and post-commit hooks for CVS that have been working very
well, but there is a caveat:

These scripts are run for each different directory that is committed.  This
means, when I commit multiple updated directories in one commit command, my
trigger scripts are called more than once.  Precisely once for each
different directory in the commit.

This is fine for most cases, but I would like to be able to determine when
the _entire_ commit has begun and when it has ended.  Is it possible?  How
can I do it?

Thanks,

appp